Turret tool-holder for lathes.



Patented May14, 1918.'

E l z. a \(s'r J Z w g 6 a;

I I i UNlTED gTATES FREDERICK PRICE, OF STECHFOBD, BIRMINGHAM, ENGLAND,ASSIGNOR OF ONE-HALF T0 CHARLES BIRCH, 0F WALSALL, ENGLAND.

TURREI TOOL-HOLDER FOB LATHES.

Specification of Letters Patent.

Patented May 14:, 1918.

Application filed October 10, 1917. Serial No. 195,782.

To all whom it may concern:

Be it known that I, FnEnnRIcK PRICE, sub ject of the King of GreatBritain, residing at Stechford, Birmingham, England, have invented newand useful Improvements in and Relating to Turret Tool-Holders forLathes, of which the following is a specification.

The invention relates to turret mountings of the type in which theturret is permitted to move forwardly under the influence of a spring toclear a positioning device to permit the turret to be rotated to bringdifferent tools into operation, the forward movement being limited by acontrol rod and regulating nut. In this invention a turret mounting isemployed in which a horizontal holder or socket part receives a hollowspigot portion of the turret, and a spring between the holder and theturret urges the latter forward to clear a peg and hole or likepositioning device between the two parts. The turret when thus projectedforwardly may be rotated to bring the different tools carried by it intooperative position. The endwise movement of the turret is controlled bymeans of a sliding rod with a removable washer at on end and a handlenut or the like at the other. The handle nut when unscrewed permits thespring to move the turret and when screwed up draws back the turretagainst the spring. By means of the removable washer the turret can bebodily removed in a very ready manner when desired to change a turret orfor any other purpose.

In order that the invention may be thoroughly understood and easilycarried into practical effect a sheet of drawings illustrating the sameis-appended hereunto.

Figure 1 is an elevation of the turret and turret mounting.

Fig. 2 is a plan thereof.

Fig. 3 is a longitudinal sectional view.

Fig. i is an end view of the turret.

Fig. 5 shows the removable washer.

Figs. 6 and 7 are respectively end views and sections of a circularturret that may be employed.

The turret a is mounted in a holder 7) pivoted in any suitable manner onthe cross slide 0. As shown the holder pivots on a central stud orpillar and is held down and secured in any adjusted position by means ofthe pins (Z which are secured in the slide and pass through segmentalslots 6 in the holder and receive binding nuts 7 as clearly shown atFigs. 1 and 2.

The holder has a horizontal socket part 9 at its forward end openinginto a larger chamber j, and a spigot part A: (Fig. 3), preferablytubular on the turret a, enters the socket g of the holder, while ashouldered part enters the larger chamber or recess Within the socketand spigot part a spring m is arranged tending to press the turretoutwardly and the turret may be held against the action of this springfor the purpose hereinafter stated by a pin or peg passing through thewall of the socket and engaging a hole a of a series of holes orrecesses in the spigot part is. In the larger chamber or recess y ahardened peg 0 may be driven or otherwise secured, adapted to engage oneof a series of holes 39 in the face of the shouldered part Z of theturret a to position the same as any particular tool of those carried bythe turret is required for operation. The number of holes in the saidshouldered part will of course correspond with the number of tool faces.As will be seen the turret rotates in a vertical plane for bringing thesuccessive tools into operation.

The turret a and holder are bored axially, see Fig. 3, and a rod 9 isarranged therein which is screwed at the tail and remote from theturret, and is operated by a handle nut r. The rotation of the rod 9 maybe prevented by a feather key or by a set pin 8 through the holderngaging a groove t in the rod. The forward end of the rod is necked downas at a and then provided with a head 2; and the latter may be engagedby a slotted washer to, see Fig. 5, assed over the neck and seating in arecess a; in the end of the turret.

A plain peg may be provided to engage the holes a of the spigot part isof the turret. Two pegs are preferably provided attached, for instance,by a chain or the like to the machine one of a length to pass throughthe hole g in the holder 6 and engage the holes of the s igot part isand the other, as shown at a being too short for this purpose, servesmerely to plug the hole 'y and prevent swarf, dirt, and th like fromentering. The short peg e as shown at Fig. 3 is in place during normalworking.

If it is desired to bring another tool into operation, the handle nut ris slackened and holes which are arranged at an incline in the faces ofthe turret, substantially as described.

7. In a turret lathe, holder having a socket therein, a turret, a spigotpart on said turret rotatable and slidably fitting Within the socket ofthe holder, a spring arranged between the turret and holder and actingto urge the turret from the holder, a rod passing throughsaid turret andholder, a removable Washer on said rod engaging the turret, an adjustingnut handle on the rod engaging the holder, said rod, Washer and nuthandle serving to Copies of this patent may be obtained for five centseach, by addressing the in combination, a

draw the turret into the holder, a positioning pin in the holder engagedby one of a series of holes in the turret when the latter is drawn intothe holder, and a peg in the holder adapted to enter one of a series ofholes in the spigot part of the turret, substantially as and for thepurpose described. In testimony whereof I have signed my name to thisspecification in the presence of two subscribing Witnesses.

FREDERICK PRICE. Witnesses:

Aoons'rrrs E. INGRAM, R. D. NICHOLLS.

Commissioner of Patents,

Washington, D. G.

